Magni 861S
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| Magni 861S | |
| Manufacturer | |
|---|---|
| Production | 1979 - |
| Engine | Four stroke, transverse four cylinders, DOHC, 2 valve per cylinder |
| Compression ratio | 10.3:1 |
| Transmission | 5 Speed |
| Frame | Tubular steel, welded, double cradle |
| Suspension | Front: 38mm Forcelle Italia telescopic forks, preload, rebound damping adjustable. Rear: Dual Koni shocks preload adjustable |
| Brakes | Front: 2x 280mm discs Rear: Single 280mm disc |
| Front Tire | 110/80 -18 |
| Rear Tire | 150/70 -18 |
| Weight | |
| Fuel Capacity | 19 Liters / 5.0 US gal |
| Manuals | Service Manual |
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke, transverse four cylinders, DOHC, 2 valve per cylinder. The engine featured a 10.3:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Multiple disc in oil bath..
Chassis[edit | edit source]
It came with a 110/80 -18 front tire and a 150/70 -18 rear tire. Stopping was achieved via 2x 280mm discs in the front and a Single 280mm disc in the rear. The front suspension was a 38mm Forcelle Italia telescopic forks, preload, rebound damping adjustable. while the rear was equipped with a Dual Koni shocks preload adjustable. The 861S was fitted with a 19 Liters / 5.0 US gal fuel tank.
Photos[edit | edit source]
Overview[edit | edit source]
MV Agusta 851S Magni
This MV Agusta 861 Magni is the work of Arturo Magni and his sons, Arturo was a legendary Italian engineer who joined MV Agusta in the early 1950s after a stint with Gilera. Any student of motorcycle racing history will immediately recognize the importance of seeing the Magni name on the side of an MV Agusta these motorcycles are unadulterated two-wheeled Italian royalty.
Arturo Magni
With Arturo heading the R&D, engineering, and race team, MV Agusta would
utterly dominate motorcycle racing up and down the classes, taking 270 Grand
Prix victories and 75 World Championships between the beginning of his tenure in
the early 50s to the time the racing department at MV Agusta shutdown in 1976.
After MV Agustas step back from racing, Arturo and his two sons Carlo and
Giovanni set up their own bespoke motorcycle company named EPM, later known more
simply as Magni. Initially the company would work only with MV Agusta
motorcycles for obvious reasons, but over the years they branched out and built
high-performance Hondas, BMWs, and Moto Guzzis.
The MV Agusta 861 Magni
One could argue that the MV Agusta 861 Magni, often just referred to as
the 861
, is the ultimate example of a Magni bike, with the obvious exception
of the track-only race bikes of the 1950s and 60s.
These bikes often started with a stock MV Agusta 750S, which was then
disassembled before being rebuilt with a new Magni frame that had been designed
with the benefit of the Magni familys long racing heritage.
The inline-four cylinder engine was rebuilt with new high-compression
pistons, swept capacity was increased from 750cc to 861cc and fitted with a pair
of street cams, four Dellorto carburetors were bolted on as well as a
chain-drive conversion, front and rear suspension was replaced with higher
performance units, the original exhaust was swapped out for Conti pipes, and a
new fairing, fuel tank, and seat were fitted too.
Not all of Magni MV Agustas received all of these upgrades, and the exact
specification list changed over the years, as enthusiasts were sending in their
750 MV Agustas to Magni for 20-plus years.
Source
| Make Model | MV Agusta 861S Magni |
|---|---|
| Year | 1979 - |
| Engine Type | Four stroke, transverse four cylinders, DOHC, 2 valve per cylinder |
| Displacement | 861 cc / 52.2 cu-in |
| Cooling System | Air cooled |
| Compression | 10.3:1 |
| Induction | 4x 27mm Dell'Orto carb. |
| Starting | Electric |
| Max Power | 71 kW / 92.5 hp @ 10000 rpm |
| Clutch | Multiple disc in oil bath. |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Frame | Tubular steel, welded, double cradle |
| Front Suspension | 38mm Forcelle Italia telescopic forks, preload, rebound damping adjustable. |
| Rear Suspension | Dual Koni shocks preload adjustable |
| Front Brakes | 2x 280mm discs |
| Rear Brakes | Single 280mm disc |
| Front Tire | 110/80 -18 |
| Rear Tire | 150/70 -18 |
| Weight | 200 kg / 440 lbs |
| Fuel Capacity | 19 Liters / 5.0 US gal |